Scandinavian airline SAS canceled 220 more flights as Swedish pilots continue striking after a new round of talks failed on Sunday. The walkout is costing SAS an estimated $1.2 million a day during the peak travel season.

Since Friday the airline’s troubles have affected some 50,000 passengers with a further 27,000 expected to be stranded on Monday.

"That would mean a cost increase of almost 100 million kronor ($12 million) a year for SAS. We can't afford that given the current competition," SAS chief executive Rickard Gustafson told Swedish news agency TT.

The airline last week successfully resolved a similar row with Norwegian pilots, who continue to fly as normal. But a 2.2-percent wage increase proposed to Swedish pilots on Sunday was rejected. The Swedes are insisting on a 3.5 percent raise.